EP2677957A1 - Instrument canalaire du type alésoir - Google Patents
Instrument canalaire du type alésoirInfo
- Publication number
- EP2677957A1 EP2677957A1 EP12711938.6A EP12711938A EP2677957A1 EP 2677957 A1 EP2677957 A1 EP 2677957A1 EP 12711938 A EP12711938 A EP 12711938A EP 2677957 A1 EP2677957 A1 EP 2677957A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- instrument
- longitudinal axis
- different
- section
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000004262 dental pulp cavity Anatomy 0.000 title abstract description 7
- 238000003754 machining Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000005520 cutting process Methods 0.000 claims description 52
- 230000005484 gravity Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 229910001092 metal group alloy Inorganic materials 0.000 abstract description 2
- 229910001000 nickel titanium Inorganic materials 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract 1
- 230000001788 irregular Effects 0.000 description 2
- 206010017577 Gait disturbance Diseases 0.000 description 1
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/40—Implements for surgical treatment of the roots or nerves of the teeth; Nerve needles; Methods or instruments for medication of the roots
- A61C5/42—Files for root canals; Handgrips or guiding means therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/303752—Process
Definitions
- the invention relates to a root canal instrument of the dental reamer type having a substantially cylindrical or conical work zone along a longitudinal axis, the instrument comprising X helicoidal flutes, forming X helical cut lips, a cutting lip being formed of the intersection two successive flutes.
- a root canal instrument of the dental reamer type having a substantially cylindrical or conical work zone along a longitudinal axis, the instrument comprising X helicoidal flutes, forming X helical cut lips, a cutting lip being formed of the intersection two successive flutes.
- Such an instrument is used in endodontics for the preparation of dental canals.
- the invention proposes a new root canal instrument, which does not have all or some of the disadvantages of the previous instruments. More specifically, the invention provides a dental reamer type instrument comprising a substantially cylindrical or conical work zone along a longitudinal axis of the instrument; the working zone comprises X helical flutes forming X helical cut lip, a cutting lip being formed of the intersection of two successive flutes, with X greater than or equal to three; According to the invention, on a cross section of the instrument, the angles between two successive cutting lips, measured with respect to the longitudinal axis of the instrument, are all different.
- the cross section has no axis of symmetry, no center of symmetry, the degree of asymmetry of the cross section is further increased.
- the degree of dissymmetry of the section of the instrument is thus increased. This increases the possibilities of curing the instrument during its progression inside the channel.
- the edges of the instrument do not come in contact at the same time with the wall of the channel, do not cut at the same time the wall of the channel.
- the instrument penetrates more easily into the canal, it progresses limping, which limits the risk of screwing, the risk of engagement of the instrument.
- the angles between two successive cutting lips, measured with respect to a center of gravity of the cross section may also all be different.
- angles between two successive cutting lips may be constant over a portion of the working area of the machine. 'instrument.
- angles between two cutting lips measured relative to the longitudinal axis of the instrument or relative to the center of gravity of the cross section, are variable over a portion of the working area the instrument .
- a portion of the instrument may here correspond to the total length of the work area of the instrument or to only a portion of the working area of the instrument.
- the angle of cut is, in the plane of a cross-section of the working area, the angle formed by the tangent of the flute on the side cutting direction and a radius passing through the cutting edge and the axis of the instrument.
- a helix angle is an angle between the longitudinal axis of the instrument and a tangent to a cutting lip in the cross section considered.
- the vertices of the cutting lips thus form an irregular triangle.
- the invention also proposes a method for producing a root canal instrument according to the invention in a cylindrical or conical rod.
- the rod is for example metal or metal alloy chosen for its mechanical properties of flexural strength and shape memory including, for example nickel-titanium.
- the method comprises a succession of machining steps by grinding a flute to a predefined depth, the predefined depths being all different from one machining step to another, and stages of rotation of the rod in front of the grinding wheel.
- the method comprises: a first machining of a helical flute along the longitudinal axis of the rod, to a first depth, A rotation of the rod along the longitudinal axis of the instrument at a first angle,
- a cross section of the instrument obtained has a substantially triangular shape (triangle passing through the vertices of the cutting lips), non-isosceles, non-equilateral, having no axis of symmetry and having no center of symmetry.
- FIG. 1 is a front view of an instrument according to the invention
- FIGS. 2a, 2b are sections A-A of the working zone of the instrument of FIG.
- FIGS. 3a and 4a are respectively a front view and a B-B section of the work zone
- FIGS. 3b and 4b are respectively a front view and a B-B section of the work area, staggered
- FIGS. 3a and 4a (instrument turned along its longitudinal axis) of a first angle with respect to FIGS. 3a and 4a
- FIGS. 3c and 4c are respectively a front view and a B-B section of the working area, offset by a second angle with respect to FIGS. 3b and 4b.
- the invention relates to a dental reamer type canal instrument comprising a substantially cylindrical or conical working zone 1 along a longitudinal axis of the instrument, that is to say the longitudinal axis of the cylindrical rod or conical in which the instrument is cut.
- the longitudinal axis is straight.
- the instrument also comprises a handle adapted to fix the instrument in an instrument holder such as a handpiece or a contra-angle.
- the angles i, ⁇ , ⁇ between two successive cutting lips, measured in relation to the longitudinal axis (point I, intersection between a cross-section and the longitudinal axis), are all different.
- the angles ⁇ , ⁇ , ⁇ between two successive cutting lips, measured with respect to a center of gravity K of the cross section are all different.
- the center of gravity K of a section is offset with respect to the longitudinal axis of the instrument, because of the specific shape of the cross section.
- the center of gravity K of each cross section is on a helix curve.
- angles between the cutting lips, i, ⁇ , ⁇ with respect to the longitudinal axis or ⁇ , ⁇ , ⁇ relative to the center of gravity K of the cross section are different from each other. others, but are constant across all sections of the work area over the entire length of the work area.
- an angle ⁇ 1 or ⁇ K of the order of 140 to 180 degrees, an angle ⁇ , ⁇ of the order of 120 to 160 degrees and an angle ⁇ or ⁇ of the order of 20 to 100 degrees give a particularly effective instrument to prepare a dental canal, by screwing, engage as little as possible in the wall of the canal.
- the real pitch Pr1, Pr2, Pr3 of a cutting lip is the axial distance between two homologous profiles of the same cutting lip, that is to say the projection on the longitudinal axis of the distance traveled when one moves along a cutting lip at an angle of 360 °.
- the apparent pitch of a cutting lip is the axial distance between two homologous profiles of two successive cutting lips.
- Pal Pr * (ai / 360);
- Pa2 Pr * ( ⁇ / 360);
- Pa3 Pr * ( ⁇ / 360).
- the angles ai, ⁇ , ⁇ between the cutting lips being all different, apparent pitch Pal, Pa2, Pa3 are also all different from each other.
- all the cutting lips are positioned on concentric circles, of center I, and diameters ⁇ J> dl, ⁇ J> d2, ⁇ J> d3 all different.
- the circles are centered on the longitudinal axis of the instrument, that is to say the longitudinal axis of the initial cylindrical or conical rod in which the instrument is cut.
- helix angles ⁇ , ⁇ 2, ⁇ 3 are all different (FIGS. 3a to 3c).
- a helix angle is an angle between the longitudinal axis of the instrument and a tangent to a cutting lip in the cross section considered.
- the cutting angles are all different.
- a cutting angle As a reminder, for a given cutting lip, formed by the intersection of two successive flutes, the cutting angle is, in the plane of a cross section of the working area, the angle formed by the tangent of the flute on the side of the cutting direction and a radius (perpendicular to the surface to be machined) passing through the cutting edge and the axis of the instrument (point I).
- the cutting angles are the angles ⁇ , ⁇ 2 and ⁇ 3.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12711938T PL2677957T3 (pl) | 2011-02-25 | 2012-02-24 | Przyrząd do kanału korzeniowego typu rozwiertak |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1151525A FR2971932B1 (fr) | 2011-02-25 | 2011-02-25 | Instrument canalaire du type alesoir. |
PCT/FR2012/050394 WO2012114052A1 (fr) | 2011-02-25 | 2012-02-24 | Instrument canalaire du type alésoir |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2677957A1 true EP2677957A1 (fr) | 2014-01-01 |
EP2677957B1 EP2677957B1 (fr) | 2019-07-03 |
Family
ID=45928943
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12711938.6A Active EP2677957B1 (fr) | 2011-02-25 | 2012-02-24 | Instrument canalaire du type alésoir |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130337407A1 (fr) |
EP (1) | EP2677957B1 (fr) |
JP (1) | JP6139413B2 (fr) |
FR (1) | FR2971932B1 (fr) |
PL (1) | PL2677957T3 (fr) |
WO (1) | WO2012114052A1 (fr) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH704706B1 (fr) * | 2011-03-18 | 2015-09-30 | Fkg Dentaire S A | Instrument endodontique pour l'alésage de canaux radiculaires. |
EP3178439B1 (fr) | 2015-12-03 | 2021-10-13 | Ormco Corporation | Lime endodontique cannelée |
MX2020002066A (es) * | 2017-08-30 | 2020-07-13 | Ishii Corp Co Ltd | Escareador conico. |
USD842474S1 (en) | 2017-10-20 | 2019-03-05 | Ormco Corporation | Endodontic file |
JP7218094B2 (ja) * | 2018-04-10 | 2023-02-06 | マニー株式会社 | 歯科用ファイル |
JP7064004B2 (ja) | 2018-08-29 | 2022-05-09 | マニー株式会社 | 歯科用ファイル |
US11980521B1 (en) * | 2023-06-28 | 2024-05-14 | Michael J. Scianamblo | Endodontic instruments |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60129042A (ja) * | 1983-12-15 | 1985-07-10 | 株式会社松谷製作所 | 歯科用リ−マ又はフアイルの製造方法 |
AU1414997A (en) * | 1995-12-11 | 1997-07-03 | Tydom Dental Corporation | Endodontic instrument |
FR2747562B1 (fr) | 1996-04-17 | 1998-06-05 | Micro Mega Int Mfg Sa | Alesoir dentaire a section de coupe tangentielle |
EP1131012B1 (fr) * | 1998-11-17 | 2005-06-01 | Gebr. Brasseler GmbH & Co. KG | Instrument pour canal radiculaire et procede permettant de le produire |
FR2798277B1 (fr) | 1999-09-10 | 2002-04-19 | Micro Mega Sa | Instrument canalaire du type alesoir dentaire et procedes de realisation |
US20040023186A1 (en) * | 2002-05-16 | 2004-02-05 | Mcspadden John T. | Multi-tapered endodontic file |
US7094056B2 (en) * | 2003-05-01 | 2006-08-22 | Scianamblo Michael J | Endodontic instrument having reversed helix |
US7398598B2 (en) * | 2003-05-13 | 2008-07-15 | Ultradent Products, Inc. | Methods for manufacturing endodontic instruments |
US20050272004A1 (en) * | 2004-06-08 | 2005-12-08 | Ormco Corporation | Non-landed endodontic instrument and methods of making such endodontic instruments |
FR2935260A1 (fr) * | 2008-09-04 | 2010-03-05 | Michel David Oiknine | Dispositif medical (lime nikel-titane) de preparation et de mise en forme canalaire |
AU2009291863A1 (en) * | 2008-09-09 | 2010-03-18 | Mark S. Ferber | Endodontic instrument and method of manufacturing |
FR2951067B1 (fr) * | 2009-10-08 | 2012-04-06 | Micro Mega Int Mfg Sa | Alesoir a canaux comprenant une pluralite de levres de coupe helicoidales |
-
2011
- 2011-02-25 FR FR1151525A patent/FR2971932B1/fr active Active
-
2012
- 2012-02-24 EP EP12711938.6A patent/EP2677957B1/fr active Active
- 2012-02-24 JP JP2013554931A patent/JP6139413B2/ja active Active
- 2012-02-24 WO PCT/FR2012/050394 patent/WO2012114052A1/fr active Application Filing
- 2012-02-24 PL PL12711938T patent/PL2677957T3/pl unknown
- 2012-02-24 US US14/001,595 patent/US20130337407A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2012114052A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20130337407A1 (en) | 2013-12-19 |
WO2012114052A1 (fr) | 2012-08-30 |
PL2677957T3 (pl) | 2020-02-28 |
JP6139413B2 (ja) | 2017-05-31 |
FR2971932B1 (fr) | 2014-01-17 |
EP2677957B1 (fr) | 2019-07-03 |
JP2014513575A (ja) | 2014-06-05 |
FR2971932A1 (fr) | 2012-08-31 |
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